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Resistive / Reactive components
Eric,
I would like to thank you for explaining to me, some time ago, that a bottle top flat at the center of the coil shows its resistive component, while the same top on edge shows the reactive component.
Well, I have now found a way to separate the two components. This means that ferric targets show up on the reactive component and non ferric targets like aluminum, copper, gold, nickel show up on the resistive component, effectively permitting to discriminate between ferric and non ferric metal targets.
More problematic are the clad coins. I mean coins with a ferric core and copper or nickel or aluminum outer layer.
Some are predominately resistive when presented flat but show their reactive component when presented on edge. These characteristics seem to be influenced by the thickness of the cladding.
Does this have to do with “Skin Effect”? ( I use rather high frequency)
Tinkerer
Eric,
I would like to thank you for explaining to me, some time ago, that a bottle top flat at the center of the coil shows its resistive component, while the same top on edge shows the reactive component.
Well, I have now found a way to separate the two components. This means that ferric targets show up on the reactive component and non ferric targets like aluminum, copper, gold, nickel show up on the resistive component, effectively permitting to discriminate between ferric and non ferric metal targets.
More problematic are the clad coins. I mean coins with a ferric core and copper or nickel or aluminum outer layer.
Some are predominately resistive when presented flat but show their reactive component when presented on edge. These characteristics seem to be influenced by the thickness of the cladding.
Does this have to do with “Skin Effect”? ( I use rather high frequency)
Tinkerer